We have just posted an update to the Tech Note that outlines Sametime support for Citrix.

I know many of you have asked us to support more features on Citrix. We have a technical approach to resolving the outstanding technical issues that prevent us from providing full support and we are working on establishing a timeline for availability.

We're making progress in the meantime and this update is particularly significant. First, we now support Citrix XenApp 6.5. Secondly, we have documented a series of workarounds that help improve the Sametime experience on Citrix XenApp including screen sharing through the Sametime Web Meetings Client and screen capture on the Sametime Web Chat Client.